Bossed arm drilling machine



BOSSED ARM DRILLING MACHINE Filed Nev. 8. 1930 fgj- 5 Sheets-Sheet l 8.9 1 @2 l|| 5*/ 79 Il 9/ '3/ 7 8 4/ II H May 30, 1933. .1. wI BROWN, JR 1,911,303

BOSSED ARM DRILLING MACHINE 'Filed Nov. 8, 1950 3 sheets-sheet 2 May 30, 1933. .1. w. BROWN, .JR

4 BOSSED ARM DRILLING MACHINE 3 Sheets-Sheet 3 Filed Nov. 8. 1950 Patented May 30, 1933 1 ir11a1vrorifice JOHN WILSON ABROWN, J OF'VPHILADELPHIA, PENNSYLVANIA Isossnnj ARM Yneinrnve MACHINE Application led. November This invention relates to drilling Vmachines, and more particularly to a multiple spindle machine for drilling bossed arms.

An important object of the invention is 5 the provision in a device of thischaracter of an assemblage such that the drilling may be conveniently carried out during rotation of the work about a central axis about which the drilling spindles are bodily rotated.

A 'further object of the invention is the provision of an assemblage of ythis characterwhich while particularly adapted for use in the drillingof bossed arms may be conveniently employed in drilling or finishing other articles. Y

A still further object of the invention is the provision in an apparatus of this character of means for cooling the drilling tools and for taking care of the cuttings and coolant in their discharge from the machine.

A stilll further object of the invention is the provision of a novel and improved aligning means for use in machines of this character which is particularly adapted for use 325 therewith.

1A still further object of the invention is the provision of a novel and improved means for securing and maintaining proper alignment between the drilling tooland thevwork table.

These and other objects I attain by the construction shown in the accompanying drawings wherein, for the purpose of illustration, I have shown a preferred embodi- "351 ment of my inventOIl and Wheell:

F ig. 1 is a perspective view of a multiple spindle machine embodying my invention; Fig. 2 is a vertical sectional view therethrough, portions ofthe mechanism being 4Q removed Fig. 3 is a sectional view illustrating the work-holding mechanism in plan;

Fig. 4 is a front elevation thereof; and

Fig. 5 isa'perspective view showing the A51 type of Varm for which lthe work-holding illustrated particularly mechanism adapted.

vReferring'now more particularly to the drawings, the numeral 1() generally desig- -5O nates a base, from which arises a standard 11 8, 1930. Serial No. 494,432.

which is reduced adjacent its lower end at 12 and again at 13 and at its upper end bears a head 1li supporting a transversely-extending drive shaft 15. Surrounding the reduced portion 12 is a cam support 16 which 5.5 has a sliding fit over the lower end of the base and is keyed thereto at 17 to prevent relative rotation. Near its upper end, `the inner face of the cam'support has an inwardly-extending flange 18 slidably fitting'Q thereduced portion 12, which portion is threaded externally as at 19 and mounts an adjustable bearing ring 20, vadjustment of which is effected through a worm 21 mounted in the cam support and co-acting with 6.5 worm threads 22.upon the outer face lof the bearing ring. At the upper end of the support the control cam 23, for mechanism hereinafter described, is mounted, this cam serving to maintain in position upon a flanged lip 24 at the upper end of the cam support a trough 25 for the reception of coolant and cuttings in a manner hereinafter described. The outer edge of this trough serves to support a guard rail 26 75. which, for a purpose hereinafter more fully set forth7 is interrupted at one point in its circumference. Surrounding theV reduced portion 13 of the carrier and seated upon a step bearing, 80.. 27A mounted on the shoulder'28 produced at the junction of the portions 12 and 13* is a carrier generally designated at29. The lower portion of this carrier has fsecured thereto a'slide carrier 30 keyed to the car- 85 rier 29 as at 31 to preventrelative rotation therebetween. This slide carrier has a sloping upper face 32 and has formed inthe side wall thereof a series of circumferentially-shaped pockets 33, the bottom walls of which likewise slope downwardly and outwardly so that any liquids or solids falling upon either the upper surface of the slide carrier Tor upon the bottom wall of the pocket will tend to move outwardly and downwardly, finally coming `to rest in the trough The slide carrier mounts a sweep brush '34; operating in the trough so that as the carrier 29 is rotated carrying with it the slide car- 100 rier, the brush acts to sweep all materials delivered to the trough longitudinally thereof and thus through a discharge opening 35.

^ The slide carrier, above and below each pocket 33, has guide bearings 36 slidably receiving the upper and lower sections 37 and Y38 ofa two-part slide, the sections of which are held against rotation in the bearings as by means of keys 39 and are connected to one another by a turnbuckle screw 40 so that the eifectivelength of the slide may be regulated. The upper section 37 is formed with a table 41 while the lower section thereof provides a cam-engaging element at present shown as a roller 42 seating upon the upper surface of the cam 23.

The upper end of the carrier 29 is defined by vertically-spaced outstanding flanges 43 and 44 preferably reinforced in alignment with the slides by radial Vwebs 45 conne-cting the same. In alignment with each slide the flanges are provided with aligned bores for the passage of spindles46 each of which is mounted at its lower end in the flange 44 through a radialv bearing 47 and a thrust 48 and has at itsupper end a radial bearing 49 slidably mounted in the opening of the flange 43. and urgedV upwardly by a spring 50. This structureV serves to remove any play which may occur through wear at the thrust 48.

The upper surface of flange 43 has secured thereto a bevel gear 5l Aand disposed outwardly of this bevel gear a composite gear 52 is rotatably mounted about gear 51 and upon the upper surface ofthe flange. The upper. surface lof the composite gear is formed as a bevel gear 53 while the outer surface thereof is provided with teeth 54 meshing with pinions 55 secured to the upper ends of t-he spindles 46. The base portion of gear 51 constitutes a compound bearing element 5,6, the outer facey ofwhich forms one race of a radial bearing, and the inner surface of which has a step 57 forming arace of athrust bearing, the comple-- mentary race 58 ofwhich is carried by the head 14 and isadjustable through screws 59 j extending vertically through the head and engaging the upper surface thereof. -Adjustment of the race 58 removes any tendency to vertical play on the part of carrier 29Aand since the thrust face ofthe race 58 is tapered, likewise serves to maintain the upper end of the carrier 29 vin proper concentricity to the standard l1.

The head 14, in addition to shaft 15 hereinbefore mentioned, mounts shafts 60 and 61 which are driven at different and suitably selected speeds from the shaft 15. Shaft 6l) has a pinion 62 meshing with gear 5l, while shaft 61 has a pinion 63 meshing with the element 53 of the compound gear 52. It will be obvious that when sha-ft 15 is driven the carrie;` 29'will be rotated about standard 11 and at the same time gear 52 will be driven at a different speed so that it moves upon the carrier and thus transmits rotation through pinions 55 to the spindles 46. Rotation of the carrier through cam 23 will result in rise and fall of the slides of'slide guide 30 so that the heads 41 will approach and recede from the spindles as the carrier is rotated. Through adjustment as by regulation of the cam, Vthe extent of the reciprocatory motion imparted to the slides may be very closely regulated and by adjustment of the slides themselves the space between a spindle and the Aassociated head and, accordingly, the space between the piece of work carried by thehea'd and a tool'carried by the spindle Ymay lbe closely determined so that at the time when these elements have their greatest spacing a minimum workable clearance may be maintained. j

The outer ends of the pockets 33 of the spindle carrier arey preferably closed by hinged doors 64 and the guard rail 26 is preferably provided with doors 65 correspending to the stations through which access may behad to slides so that with the machine stopped, an adjustment of all of the slides may be effected.

Mounted upon each head 41 is a table 66 having its under ksurface recessed as at 67. The upper surface of the table has a socket 68 within which is seated a cup 69. This cup comprises a base 70 fromY which arise a series of circumferentially-spaced projections 71 adjacent faces 72 of which are inclined downwardly so that a downwardly tapering socket is definedr thereby, the walls of which have slots 73. Slidably directed through the table is a headed stud 74 urged downwardly through the table by a spring 75. Surroundingthisstud is'a sleeve 76 reduced at its upper end to provide a seat 77. Between the upper extremity of the bushing and thehead 78 of the stud a washer is arranged, this washer having a `rconvex lower face 79. Arising from the table adjacent'the rear end thereof are a pair of l the guide rod 82 and, accordingly, downward movement of the plate 81. Between the stop nut 84 and the flange 43 a spring 85 surrounds the rod 82 and serves vto con-k .stantly urge this rod downwardly so that the nut 84 would normally engage flange44.

Secured to the lower surface of the plate 81l is ,a cup of the same type as the cup of table 66. Plate 81 has openings through which the guide rods extend.

VIt will be obvious that in adjusting the tables 66 upon the heads, engagement of these guide rods in the openings of the plate 81, before tightening of the clamp bolts 86 securing the table in position upon the head, will insure proper alignment between these elements. Plate 81 may embody a drill guide 87 to guide a drill 88 carried by spindle 46 and may have secured thereto an element 89 of a coolant delivery pipe 90, communicating at its upper end with a stationary coolant trough 91 in the manner described in my prior application filed March 14, 1930, Serial No. 435,893.

Apparatus of the character just described is particularly adapted for drilling double bossed arms such as exemplified by gearshifting fork 92 illustrated in Fig. 5. This fork comprises an arm 93 having opposite faces thereof provided with aligned bosses 94 and having in one-end a slot 95. The bosses of the arm have an outstanding rib 96 and in the completed structure a bore 97 extends through the bosses for the passage of a shaft upon which the fork is mounted. The operation performed by the machine is that of forming the bore 97 and in inserting this arm to the machine which is done when the table 66 and the plate fixture 81v are most widely separated, one of the bosses is seated in the lower cup with the slot of the arm embracing the reduced portion of bushing- 76 beneath washer 79. lIhe downward pressure exerted by this washer upon the arm at the sides of the slot tends to hold the bossed portion of the arm upward while the cup 69 of the table centers this lower boss. As the carrier rotates and cam 23 elevates the table 66, the upper boss engages in the cup of the plate 81 and is centered thereby, spring providing sufficient pressure to insure maintenance of position. After the upper boss is fully seated, the plate 81 moves upwardly with the table and the drill 88 comes into engagement with the work to form bore 97. It will be quite obvious that although the fixtures of the table and plate 81 are at present illustrated for use with the particular type of bossed arm shown in Fig. 5, a slight modification thereof would adapt the structure for use with any bossed arm whether it be double bosses as illustrated in this figure, or have a single boss and whether it be provided `with a slotted arm or not. It is merely necessary that means be provided for properly centering the work at both ends of the portion thereof which is to be drilled and that a means be Y provided for guiding the work to the positioning means of the plate 81.

The structure being otherwise capable of modification without in any manner departing from the spirit of my invention, I do not wish to be undei'stood as limiting myself thereto except as hereinafter claimed.

I claim: y

V1. In apparatus V for performing rotary cutting operations on bossed arms and in combination a cutter, a work table, means for relatively moving the cutter and work table to cause approach thereof, a cup carred by the work table to receive the boss f combination a cutter, a work table, means l* for relatively moving the cutter and work table to cause approach thereof, a cup carried by the work table to receive the bossvof the arm, a yieldable member associated with the cutter to engage the arm and force the bossV into the cup prior to engagement of the cutter with the arm, and means upon the work table embodying resiliently engaged clamping elements adapted to receive the arm in spaced relation tothe lboss thereof.

3. In apparatus for performing a rotary cutting operation on a bossed arm having bosses at opposite faces thereof and in combination a cutter, a work table, means for relatively moving the cutter and work table to cause approach thereof, a cup carried by the work table to receive a boss at one side of the arm, a yieldable member associated with the cutter having a cup to receive the boss at the opposite face of the arm, and means carried by the work table in spaced relation to the cup thereof to engage the outer end of the arm and maintain the arm in predetermined relation to the work table, said means including yieldably engaged members between which the arm is clamped.

4. In apparatus for performing a rotary cutting operation on a bossed arm having table with the last-named boss positioned for entry in the cup of the yieldable member.

5. In a rotary cutting machine, a stationary standard, a carrier mounted for rotation, cutters, a plurality of tables carried by the Carrier, movable slides mounting said tables, means for moving said slides to cause Work carried by the tables to move into and out of cooperative relation with the cutters, including a stationary support carried by the standard, an annular trough fixed to said support and adapted to receive cuttings from Cutters carried by said spindles, said trough having a. discharged opening in its bottom and a brush carried by the carrier and operating in the trough to propel the cuttings along the trough bottom to said discharge opening. n

6. vIn a rotary cutting machine, a stationary standard, a carrier mounted for rotation, cutters, a plurality of tables carried by the carrier, movable slides mounting said tables, means for moving said slides to cause Work carried by the-tables to move into and out of Cooperative relation with the cutters, including a stationary support carried by the standard, an annular trough fixed to said support and adapted to receive cuttings from cutters carried by said spindles, said trough having a discharge opening in its `bottom, a brush carried by the carrier and, operating in the trough to propel the euttings along the trough bottoni to said discharge opening, and a guard rail mounted upon the louter edge of said trough.

JOHN VLSON BROWN, Jig. 

